Refillable multiple fuse



UNITED STATES PATENT OFFICE. i

oTTo GmvmmoasT AND LUIS HLLRTGL',F0F BUENOS AIRES, ARGENTINA REFILLABLE MULTIPLE FUSE.

Specification of Letters Patent.

Patented Feb. 7, 19422.

Application led December 29, 1919. Serial No.'348,216.

To all whom t may concern.'

Be 1t known that we OTTO GRAvENHoRsT,

`Argentina, and LUIS HLLRIGL, a Swiss Vsubject, both residing at Buenos Aires, Argentina, Galera Guemes 4110/ 1, have invented a certain new and useful Improvement in a Refillable Multiple Fuse, of which the following is a specification.

Our invention relates to circuit makers,

and more particularlyy to a magazine fuse adapted semi-automatically to re-establish .an electrical circuit by the substitution of ruse of tools or skilled labor or knowledge.

A further object is the provision of a manually operable device of the magazine type, permitting repeated use and'capable of manipulation with the same easer and simplicity as a springer snap-switch. A particular object is the provision of a'v device of the described class which shall `have the capacity to permit not only repeated resetting of the connection through a fuse-link or fuse wire without dismemberment or skilled attention,

but which device shall also be capable of refilling for reuse. Other objects attained by our invention will appear Vfrom the ensuing detailed description thereof.

Our invention consists ina device having a lixed base adapted to receive the circuit terminals, a revoluble housing associated therewith comprising a magazinev and containing a series of mutually insulated fusible elements separately mounted therein, and means whereby these fusible elementsmay be successively brou-ght into intimate electrical contact with the circuit terminals and such intimacy of contact operatively maintained, which device We have termed a refllable multiple fuse.

Reference is made to the drawings forming part of this specification for a more detailed disclosure of the preferred form in which our invention may be physically embodied, in which drawings like numerals of reference indicate like parts throughout the several views, and in which Figure 1 is a vertical sectional view of the assembled circuit maker; Figure 2 is a view in perspective;

Figure 3 is a-plan view of the'bottom of the revoluble housing lettered'A in Figure 1; Figure 4 is a-plan view ofthe top of the fixed base lettered B in Figure 1,' Figure 5 shows an enlarged detail of a part of the housing and base, in vertical section, upon the line V- V `of Figure 3; and Figure 6 shows an enlarged detail in vvertical section upon the line VIe-VI of Fig. 5.

The circuit maker essentially comprises two relatively vmovable parts, the top A which constitutes a housing for the fusible elements and which is `preferably of a vitreous material, as porcelain, and is in circular form, and a supporting base B of like lmaterial adapted to be permanently fixed inl association with the wires of the circuit to be closed through said fusible elements. The partl A has a series of channels 1, 1 therethrough, regularly disposed atspaced intervals thereabout, these channels having openings 2, 2 adjacent the top of the housing to afford vents for the gases lof fusion and also to permit inspection andtoconstitute eyes through which the fuse wires 3, 3 may be conveniently threaded, permitting their attachment at their ends to the binding p screws l and 5, respectively. The screw 4V binds one end of the'fuse to the terminal plate 6, and the screw 5 binds the other Yend of the fuse to the terminal plate 7, which plates are secured by screws, as shown, to the body of the housing. .The plates 6 and 7 are separated by the circular boss 8 formed by extension of the bodyv of the housing, which boss enters a corresponding recess 9 in the base B. Upon this base are the contact plates 10 and 11 .associated respectively ywiththe bindingposts 12and 13, which receive respectively the'line circuit terminals between pairs of clamping nuts 121 and 15. To assure a positive seating of the fuse contacts with the line contacts, and assure accuracy in this regard, the plates 6 and 7 have the extension or shoulders 16 formed thereon, and the plates 10 and 11 have corresponding recesses or grooves 17 formed therein which function as hereinafter described upon rotation of the housing A upon the spindle 20 which passes vertically therethrough and through the base B in the channel 18, 18, securing the parts together by the screw threaded extension 19 which engages a nut thereon. 'The upper end of the spindle 20 has the adjustable screw cap 21 which tensions a leaf spring 2 2 against the housing A,

tion.

permitting relative vertical movement of the housing .A with relation to the base B when the former is rotated to advance a fusible element to circuit-closing position. By virtue of the vertical play afforded, the shoulders 16 upon the. plates 6 and 7, when they strike the rounded edge ofwthe vplates l() and 11, ride upward and across the upperfaces vof these plates until the groove 17 is encountered, when they seat positivelvltherein under-springstress;1 A pointer 23 or like visible indicator, upon. theel-base, shows the registry of Contact by its correspondence with one Vof the marks 24;, Vcarried bythe revoluble' housing A. Y. n i .It will be obvious that the fusible elements `carried byptheidevice` may vbe numerous.

Twelve are shown as a convenient illustra- When all` have been Vdissipated or Abroken or otherwise become unserviceable,` the device may be reloaded. 'If desired, the

vents 2, 2 may b e sealed, ample space being afforded for dissipationof any products of combustion by the clearance between the two bodies'AandrB. Y f.

l' By our device,.a compact,'simple and safe means is afforded, and one particularly? adapted to domestic installation, though its 4utility is not ci'rcumscribed, since it is 4 adapted to all'classes of usage, -and may be (suitably designed for` larger'ampera'ge.

Having thusdescribed our invention and V'without desiring to be understood as limit-V ing its utilities, advantages or'scope, save 35 YV f lclaimt asl specified in the appended 'A claims, we

Vl. In an' electro-protectiver device, in combination, .arbase,line terminals thereon, contactvplatesV secured to said terminals, `a channelled, rotatable cover, a plurality of fuses separately mounted in the channels thereof, *Y afpairv of terminal platesfor each fuse, a

Y .circulan lug depending kfrom said cover '.adapted to engagefacorresponding groove V.-"relative positionsof ythe members when'the' in saidbaseand adapted topreserve the coverisrotated, the line contactplates being @radially disposed relatively to an azrialspin-V 2. In an electroprotective devicenof lthe reillable multiple fuse type, in combination, a circular chambered base having an' annular groove in the botto-m of its chamber,a chan- Anelled fuse-holdingVv magazine-cover having a cylindrical body portion adapted to extendV into the chamber of the base; an annular lug upon said body portion of thejcover adapted to register with said4 annular groove; *anV axial spindle extending through the base andicover about'which' the cover' `may be rotated;V a pair "of radially'rdisposed contact plates upon saidbase, separated bytheannular groove therein Yandrextending above the bottom of its chamber;"a plurality of" fuses'disposed in the channels of said maga- Zine-cover; pair'srof radially disposed ter- Y minal plates lassociated with VVeach fuse mountedl onV the body-portion of saidl cover, eachlpair beingmutually separated by the annular lug. upon" said Vbodyportion, and n having aV downwardly Vprojecting tongue adapted successively to engagethe contact plates upon the base upcny rotation of the cover, such engagement causingV a vertical Iinoveinent Yoff the cover 'relatively to the base as lthe tongues upon the useterminal plates 'ride over the contact plates uponV the base,

and means comprising aspring upon saidV spindle adapted toy holdv'theV plates 4in inti-v mate contact.

In ltestimony whereof we aiiiX our signautres` presenceof two witnesses. Y oT'ro G nAvENHoRsT.

v LUIS 'IjIOLIKJRIGrLi` witnesses! JOHN W. CoNNnnLY,.Jr., RoDoLFo RAMREZ.

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